This piece is a highly demanding transcription based on Paganini's virtuosic violin caprices. It translates Paganini’s extreme technical innovations, such as rapid shifts and complex bowings, into aggressive, idiomatic piano writing.
The primary challenge is the execution of rapid octave-runs and wide-span arpeggios at high speed.
Comparable difficulty and character — good candidates for what to learn next.
Bravourstudie No.1 nach einer Caprice von N. Paganini is rated Henle level 9 of 9 — virtuoso repertoire, roughly concert / virtuoso level. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 9 — meaning you can already play level 8–9 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Bravourstudie No.1 nach einer Caprice von N. Paganini lasts about 5 minutes.
Bravourstudie No.1 nach einer Caprice von N. Paganini is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Bravourstudie No.2 nach Themen von Nicolaus Paganini by August Stradal, Wanderer Fantasy in C major by Franz Schubert, Rhapsodie espagnole by Franz Liszt — see the full similar-pieces list on this page.